Org-mode is often cited as the main reason to use Emacs, and one of the main
reasons that people switch from other editors. If you boil Org down to its
simplest form, it's really a plain-text markup system with a large library of
interactions that operate on that text.

We'll be using an example org file to follow along, so check out the example.org
(here's an HTMLized version) file. There's no way I can cover everything that
org-mode offers in a single session, so we'll start with some of the basics and
can elaborate on them in further talks.

People have written whole books in Emacs with org-mode (I wrote a couple
of the chapters of Elasticsearch In Action with org-mode), as well as teaching
classes and writing/grading assignments with it.